I just did my first 3 sinewed bows this past couple weeks. On the first 2 I used TB liquid hide glue and on the last I used Knox.
I wish I had used it on all 3.
The TB didn't seem to gel quick and it was therefore slipping around with the sinew when butted against the last bunch so I don't think I got the stretch effect as well. I haven't seen any noticable change in the curve of the bow on those 2.
The knox bow was twice as fast and the glue gelled just right so the previous bundle didn't get pushed around and I got better overlap and stretch.
It has taken a couple inches of flex so far in a few days
I mixed it 1/2 cup water to each packet on the stove and then put it in a warmed up crock pot and switched back and forth from warm to low setting. 3 packs did a short bow no problem and didn't need any thinning.
I only have those 2 glues to compare but sure will use knox again next time I sinew something